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Rohde And Schwarz
Rohde & Schwarz GmbH & Co KG (, ) is an international electronics group specializing in the fields of electronic test equipment, broadcast & media, cybersecurity, radiomonitoring and radiolocation, and radiocommunication. The company provides products for the wireless communications, broadcast & media, cybersecurity and electronics industry, aerospace and defense, homeland security and critical infrastructures. In addition to the Munich headquarters, there are regional headquarters in the United States (Columbia, Maryland) and in Asia (Singapore). About 7,700 of the company's employees work in Germany. Worldwide the company has a total of around 13,000 employees in over 70 countries. Exports account for around 85 percent of revenues. History The company was founded by Lothar Rohde and Hermann Schwarz who met while studying physics in Jena. They built their first T&M instrument in 1932, and in August 1933, the ''Physikalisch-Technisches Entwicklungslabor Dr. Rohde & Dr. Schw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Munich
Munich ( ; german: München ; bar, Minga ) is the capital and most populous city of the States of Germany, German state of Bavaria. With a population of 1,558,395 inhabitants as of 31 July 2020, it is the List of cities in Germany by population, third-largest city in Germany, after Berlin and Hamburg, and thus the largest which does not constitute its own state, as well as the List of cities in the European Union by population within city limits, 11th-largest city in the European Union. The Munich Metropolitan Region, city's metropolitan region is home to 6 million people. Straddling the banks of the River Isar (a tributary of the Danube) north of the Northern Limestone Alps, Bavarian Alps, Munich is the seat of the Bavarian Regierungsbezirk, administrative region of Upper Bavaria, while being the population density, most densely populated municipality in Germany (4,500 people per km2). Munich is the second-largest city in the Bavarian dialects, Bavarian dialect area, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Air Force
The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947. It is the second youngest branch of the United States Armed Forces and the fourth in order of precedence. The United States Air Force articulates its core missions as air supremacy, global integrated intelligence, surveillance and reconnaissance, rapid global mobility, global strike, and command and control. The United States Air Force is a military service branch organized within the Department of the Air Force, one of the three military departments of the Department of Defense. The Air Force through the Department of the Air Force is headed by the civilian Secretary of the Air Force ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hameg
HAMEG Instruments GmbH was a German enterprise specialized in the development and production of laboratory instruments (such as oscilloscopes). The company was located in Mainhausen near Frankfurt, Germany until it was completely integrated in the test & measurement division of Rohde & Schwarz in 2016. As a result, HAMEG as an independent company was closed. History The business was established in 1957 by Karl Hartmann in Frankfurt/Main under the name HAMEG KG. The company name is derived from Hartmann-Messgeräte. The first product was a 5 MHz one channel oscilloscope. In 2005, the company founder retired and the business was acquired by the electronics company Rohde & Schwarz with headquarters in Munich. During that time, the name was changed to HAMEG Instruments GmbH. HAMEG maintained subsidiaries in Chemnitz (product development) and Münchenbernsdorf (PCB assembly) as well as a distribution subsidiary in France (HAMEG Instruments France S.a.r.l.). At the end of 2010, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tesla (Czechoslovak Company)
Tesla (stylized as TESLA) is a Czech brand of electronic appliances. The name was originally used by a state-owned conglomerate that was the monopoly producer of electronic appliances and components in the former Socialist Republic of Czechoslovakia. The conglomerate was founded in 1946 and ran until 1991, when it was privatised. The Tesla name is used by its successor company and former subsidiaries in the Czech Republic and Slovakia. Company The company was established as ''Elektra'' on 18 January 1921 and renamed Tesla on 7 March 1946. A founding ceremony took place on 10 August 1946 at the Mikrofon Factory in Strašnice attended by government ministers from Czechoslovakia, Yugoslavia and Macedonia. It was named after the pioneer scientist Nikola Tesla, but when the association with a Serbian American became politically inconvenient it was explained as abbreviation from , which means "low-current technology". Tesla had several production locations, including those at Lip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Bohemian Region
The South Bohemian Region ( cs, Jihočeský kraj; , ) is an administrative unit (''kraj'') of the Czech Republic, located mostly in the southern part of its historical land of Bohemia, with a small part in southwestern Moravia. The western part of the South Bohemian Region is former Prachens (Prácheňsko), a huge archaic region with distinctive features with its capital, Písek. In 2011, there were 624 municipalities in the region, whereof 54 had a status of a town. The region borders (from the west clockwise) the regions Plzeň, Central Bohemia, Vysočina and South Moravia. To the south it borders Austria (Lower Austria and Upper Austria) and Germany (Bavaria). Until 30 May 2001, the region was named as or , after its capital, České Budějovice. Due to its geographical location and natural surroundings the region belongs to the first settlements that appeared in the distant past. Over the past centuries, the South Bohemian region has been known for fishpond cultivation a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vimperk
Vimperk (; german: Winterberg) is a town in Prachatice District in the South Bohemian Region of the Czech Republic. It has about 7,300 inhabitants. The town centre is well preserved and is protected by law as an Cultural monument (Czech Republic)#Monument zones, urban monument zone. Historically Vimperk has been known as an important regional trade centre, being located on the Golden Trail from Passau to Prachatice. Vimperk is also renowned for its glass-making and printing traditions. Administrative parts Vimperk is made up of three town parts and 19 villages: *Vimperk I *Vimperk II *Vimperk III *Arnoštka *Bořanovice *Boubská *Cejsice *Hrabice *Klášterec *Korkusova Huť *Křesanov *Lipka *Michlova Huť *Modlenice *Pravětín *Skláře *Solná Lhota *Sudslavice *U Sloupů *Veselka *Vnarovy *Výškovice Geography Vimperk is located about west of Prachatice and west of České Budějovice. The southern half of the municipal territory lies the Bohemian Forest and is protecte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TETRA
Terrestrial Trunked Radio (TETRA; formerly known as Trans-European Trunked Radio), a European standard for a trunked radio system, is a professional mobile radio and two-way transceiver specification. TETRA was specifically designed for use by government agencies, emergency services, (police forces, fire departments, ambulance) for public safety networks, rail transport staff for train radios, transport services and the military. TETRA is the European version of trunked radio, similar to Project 25. TETRA is a European Telecommunications Standards Institute (ETSI) standard, first version published 1995; it is mentioned by the European Radiocommunications Committee (ERC). Description TETRA uses time-division multiple access (TDMA) with four user channels on one radio carrier and 25 kHz spacing between carriers. Both point-to-point and point-to-multipoint transfer can be used. Digital data transmission is also included in the standard though at a low data rate. TETRA Mob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DVB-T
DVB-T, short for Digital Video Broadcasting – Terrestrial, is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in Singapore in February, 1998. This system transmits compressed digital audio, digital video and other data in an MPEG transport stream, using coded orthogonal frequency-division multiplexing (COFDM or OFDM) modulation. It is also the format widely used worldwide (including North America) for Electronic News Gathering for transmission of video and audio from a mobile newsgathering vehicle to a central receive point. It is also used in the US by Amateur television operators. Basics Rather than carrying one data carrier on a single radio frequency (RF) channel, COFDM works by splitting the digital data stream into a large number of slower digital streams, each of which digitally modulates a set of closely spaced adjacent sub-carrier frequencies. In the cas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Audio Broadcasting
Digital radio is the use of digital technology to transmit or receive across the radio spectrum. Digital transmission by radio waves includes digital broadcasting, and especially digital audio radio services. Types In digital broadcasting systems, the analog audio signal is digital audio, digitized, Audio compression (data), compressed using an audio coding format such as AAC+ (MDCT) or MPEG-1 Audio Layer II, MP2, and transmitted using a digital modulation scheme. The aim is to increase the number of radio programs in a given spectrum, to improve the audio quality, to eliminate fading problems in mobile environments, to allow additional datacasting services, and to decrease the transmission power or the number of transmitters required to cover a region. However, analog radio (AM and FM) is still more popular and listening to radio over IP (Internet Protocol) is growing in popularity. In 2012 four digital wireless radio systems are recognized by the International Telecommunicati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Memmingen
Memmingen (; Swabian: ''Memmenge'') is a town in Swabia, Bavaria, Germany. It is the economic, educational and administrative centre of the Danube-Iller region. To the west the town is flanked by the Iller, the river that marks the Baden-Württemberg border. To the north, east and south the town is surrounded by the district of Unterallgäu (Lower Allgäu). With about 42,000 inhabitants, Memmingen is the 5th biggest town in the administrative region of Swabia. The origins of the town go back to the Roman Empire. The old town, with its many courtyards, castles and patricians' houses, palaces and fortifications is one of the best preserved in southern Germany. With good transport links by road, rail and air, it is the transport hub for Upper Swabia and Central Swabia, and the Allgäu. Due to its proximity to the Allgäu region, Memmingen is often called the Gateway to the Allgäu (''Tor zum Allgäu''). The town motto is ''Memmingen – Stadt mit Perspektiven'' ("Memminge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frankfurt Airport
Frankfurt Airport (; german: link=no, Flughafen Frankfurt Main , also known as ''Rhein-Main-Flughafen'') is a major international airport located in Frankfurt, the fifth-largest city of Germany and one of the world's leading financial centres. It is operated by Fraport and serves as the main hub for Lufthansa, including Lufthansa CityLine and Lufthansa Cargo as well as Condor and AeroLogic. The airport covers an area of of land and features two passenger terminals with capacity for approximately 65 million passengers per year; four runways; and extensive logistics and maintenance facilities. Frankfurt Airport is the busiest airport by passenger traffic in Germany as well as the 4th busiest in Europe after London–Heathrow, Paris–Charles de Gaulle and Amsterdam Airport Schiphol. The airport is also the 13th busiest worldwide by total number of passengers in 2016, with 60.786 million passengers using the airport in 2016. In 2017, Frankfurt Airport handled 64. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doppler Effect
The Doppler effect or Doppler shift (or simply Doppler, when in context) is the change in frequency of a wave in relation to an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842. A common example of Doppler shift is the change of pitch heard when a vehicle sounding a horn approaches and recedes from an observer. Compared to the emitted frequency, the received frequency is higher during the approach, identical at the instant of passing by, and lower during the recession. The reason for the Doppler effect is that when the source of the waves is moving towards the observer, each successive wave crest is emitted from a position closer to the observer than the crest of the previous wave. Therefore, each wave takes slightly less time to reach the observer than the previous wave. Hence, the time between the arrivals of successive wave crests at the observer is reduced, causing an increa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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